‘The lesson from the Brexit is that these effects can be material’

JACKSON HOLE, Wyo.—Bank of England Gov. Mark Carney said global growth prospects are flagging due to a trade war pursued by Washington, creating new challenges for economic policy makers.

“The pickup that we’ve been expecting in global growth has not transpired,” Mr. Carney said in an interview Friday on the sidelines of the Federal Reserve Bank of Kansas City’s annual symposium in the Grand Teton National Park. “When we trace it, it’s not because of Fed policy. It’s not because of global financial conditions. It’s not because...